Type B Gas Commissioning & BMS Verification SWMS
A Safe Work Method Statement for type b gas commissioning & bms verification covering all key hazards, controls and regulatory requirements. This is classified as high-risk construction work under WHS Regulation 2025.
SWMS variants reference your state’s WHS legislation. Instant download after payment.
Type B gas appliance commissioning covers the commissioning and certification of Type B gas appliances and installations — confirming that a high-capacity industrial or commercial gas appliance is correctly installed, the combustion is correct, the ventilation and flueing are adequate, and the controls and safety systems function, before the appliance is certified and placed in service. Type B commissioning is the most safety-critical step in Type B gasfitting: the appliances are high-load and complex, and an appliance commissioned with incorrect combustion or non-functioning safety systems can release carbon monoxide or fail catastrophically. This document is written on the basis that Type B commissioning is carried out by a person authorised for Type B work, with the combustion testing, safety-system verification and certification the standard requires before the appliance is used.
Type B appliances are commissioned to AS/NZS 5601.1:2022 Gas installations Part 1, which addresses Type B appliances, together with the Type B certification requirements administered by the relevant gas technical regulator, under which the appliance must be certified by an authorised person before it may be used. Commissioning includes leak and pressure testing, combustion testing with carbon monoxide verification, and the verification of the complex controls and safety systems. This document coordinates the gas-standard, combustion, safety-system and certification controls so the appliance is commissioned, certified and left safe.
Hazards identified
9 hazards covered, sorted by priority.
Carbon monoxide poisoning from incomplete combustion on the high-load appliance
Major fire, explosion or asphyxiation from a leak during commissioning
A high-capacity appliance placed in use without functioning safety systems
Combustion-product accumulation and carbon monoxide in the space
Major flash fire or explosion from an ignition source during the work
Dangerous high-capacity appliance operation, flame failure or overheating
Severe burns from the hot industrial appliance and flue during commissioning
An unsafe high-capacity appliance used without Type B certification
Risk to and disruption of operations and personnel during commissioning
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Administrative: confirm the Type B appliance is installed to AS/NZS 5601.1:2022 before commissioning, and ensure the appliance is certified by an authorised person to the Type B certification requirements before it is used.
- 2Administrative: leak test and pressure test the installation before placing the appliance in service, confirming it is gas-tight.
- 3Engineering: carry out combustion testing on the commissioned appliance — confirming correct combustion, gas type, pressure and flame — and verify there is no carbon monoxide hazard.
- 4Administrative: verify the complex controls and safety systems function, and do not certify or place the appliance in service without functioning safety systems.
- 5Engineering: confirm the ventilation and flueing are adequate for the high gas load so combustion products are safely discharged, and manage the hot-surface hazard.
- 6Administrative: control all ignition sources during the work — no naked flames, no electrical switching, and control of static — and use a gas detector or approved leak-detection fluid rather than a flame for leak finding.
- 7Administrative: coordinate the commissioning in the operating industrial premises so operations and personnel are protected, and provide the operating information on handover.
- 8Administrative: ensure the work is carried out and certified by an appropriately licensed gasfitter or plumber under the relevant state or territory gasfitting and plumbing licensing scheme, with a compliance certificate issued where required.
- 9Administrative: all workers must hold a valid White Card (General Construction Induction Training, CPCCWHS1001) before entering any construction workplace, with the gasfitting, plumbing and any confined space competencies and licences required for the work.
- 10Administrative: conduct a daily pre-start toolbox talk covering the day's work, identified hazards, isolations, required PPE and emergency procedures, and record attendance in the consultation section.
- 11Administrative: consult workers and any health and safety representatives on the work and its risks, record the consultation, and keep this document available at the workplace.
- 12PPE: eye protection to AS/NZS 1337.1, hearing protection where required, gloves appropriate to the task, and Class I or Class II safety footwear with protective toecap to AS/NZS 2210.3.
- 13Administrative: review and update this SWMS whenever the work scope changes, after any incident or near miss, when a worker or health and safety representative raises a concern, when new hazards are identified, or at minimum every 12 months.
Applicable Codes of Practice
The prevailing gas installation standard addressing Type B appliance commissioning, leak testing, ventilation and combustion.
The certification of Type B appliances by an authorised person before the appliance may be used.
Management of the gas and oxidising gases and the fire and oxygen-enrichment hazards.
The risk management process and hierarchy of controls applied to the hazards of the work.
Selection, fit testing and use of respiratory protection where atmospheric hazards, purging or confined conditions require it.
Who this is for
- →Persons authorised for Type B gas appliance commissioning and certification.
- →Industrial and commercial gas commissioning specialists.
- →Mechanical services businesses commissioning boilers, burners and furnaces.
- →Industrial PCBUs requiring Type B appliances commissioned.
- →PCBU safety managers and supervisors coordinating the combustion, safety-system and certification controls.
What you receive
- ✓Editable Microsoft Word document (.docx) fully compatible with Microsoft Word 2016 and newer, Google Docs, and LibreOffice Writer.
- ✓Title page with editable fields for PCBU name, ABN, site address, project name, principal contractor details, and document revision date.
- ✓Hazard register with the type b gas appliance commissioning hazards — each with a documented consequence, inherent risk rating on a 5x5 likelihood-consequence matrix, hierarchy-of-control measures, and residual risk rating.
- ✓Type B commissioning prompts referencing AS/NZS 5601.1:2022 and the Type B certification requirements, a combustion-testing and carbon-monoxide-check section, a safety-system-verification section, and a certification and handover record.
- ✓Licensing and compliance-certificate prompts for the relevant gasfitting and plumbing scheme, the Type B or medical gas certification where applicable, and a respiratory protection selection and fit-test record per AS/NZS 1715 where relevant.
- ✓Worker consultation record per the model WHS Act consultation duty and a worker sign-on register (blank, expandable).
- ✓Applicable legislation and Codes of Practice schedule pre-populated for the model WHS jurisdiction with a state-variance reference table covering the harmonised states, plus Victoria.
- ✓Emergency procedure template and a revision log.
Worked example
A person authorised for Type B work is engaged to commission a newly installed industrial gas-fired furnace. The appliance is confirmed installed to AS/NZS 5601.1:2022, and it is certified by an authorised person to the Type B certification requirements before it is used. The installation is leak tested and pressure tested to confirm it is gas-tight. Combustion testing is carried out on the commissioned appliance — confirming correct combustion, gas type, pressure and flame — with a carbon monoxide check, and the complex controls and safety systems are verified to function, with the appliance not certified or placed in service without them. The ventilation and flueing are confirmed adequate for the high gas load, and the hot-surface hazard managed. Ignition sources are controlled during purging and commissioning, and a gas detector is used for leak finding. The commissioning is coordinated with the operating premises so operations and personnel are protected, the operating information is provided on handover, the appliance is certified, and the records retained.
Related legislation
- Model Work Health and Safety Act — primary duty of care; the duty to consult workers; the reckless-conduct offence; and notifiable-incident provisions, as enacted in each jurisdiction.
- Model Work Health and Safety Regulations — Section 291 high risk construction work and the SWMS preparation and review duties, and the confined space, excavation and pressurised-gas provisions where applicable, as enacted in each jurisdiction.
- The gas installation standard AS/NZS 5601.1:2022, the LP Gas storage standard AS/NZS 1596, the medical gas standard AS 2896, and the relevant plumbing and drainage standards AS/NZS 3500, are called up by the state and territory gas and plumbing safety legislation, together with the Type B and medical gas certification requirements and the gas network operator's requirements where applicable.
- Gasfitting and plumbing work is licensed under each state and territory's gasfitting and plumbing licensing scheme, with Type B authorisation and medical gas certification required for that work, and compliance certification required for notifiable work.
- Victoria operates under the Occupational Health and Safety Act 2004 and the Occupational Health and Safety Regulations 2017, with the high risk construction work, confined space and excavation provisions applying in place of the model instruments.
Frequently asked questions
What does Type B commissioning involve?
Type B commissioning confirms that a high-capacity industrial or commercial gas appliance is correctly installed, the combustion is correct, the ventilation and flueing are adequate, and the controls and safety systems function, before the appliance is certified and placed in service. It includes leak and pressure testing, combustion testing with carbon monoxide verification, and safety-system verification to AS/NZS 5601.1:2022.
Who can commission a Type B appliance?
Type B commissioning is carried out by a person authorised for Type B work, and the appliance must be certified by an authorised person to the Type B certification requirements before it is used. Type B is the most safety-critical category of gasfitting, so the commissioning and certification are reserved to authorised practitioners.
Why is Type B commissioning so safety-critical?
Type B appliances are high-load and complex, so an appliance commissioned with incorrect combustion or non-functioning safety systems can release carbon monoxide or fail catastrophically. The combustion testing, carbon monoxide verification and safety-system verification confirm the appliance is safe before it is certified and placed in service, which is essential given the high capacity.
Is the appliance certified before use?
Yes. The Type B appliance is certified by an authorised person to the Type B certification requirements before it may be used, after the commissioning confirms the installation, combustion and safety systems. The certification is mandatory because Type B appliances are high-capacity and custom-engineered, and an uncertified appliance must not be placed in use.
What is checked during combustion testing?
Combustion testing confirms correct combustion, gas type, pressure and flame on the commissioned appliance, and verifies there is no carbon monoxide hazard. Carbon monoxide is a colourless, odourless and potentially fatal product of incomplete combustion, so the combustion testing and carbon monoxide check are central to commissioning a high-load Type B appliance safely.